Propulsion PDR

Propulsion PDR

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Propulsion PDR

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1. Propulsion PDR AAE 451 Fall 2006 Team Whishy Washy Tung Tran Mark Koch Matt Drodofsky Matt Lossmann Ravi Patel Ki-bom Kim Haris Md Ishak Andrew Martin

2. Summary • Revisit Sizing • Selection Procedure • Define Advanced ratio and Propeller parameters • Propeller selection • Motor, Gear Box, Speed controller selection • Battery analysis

3. Review of Vehicle Sizing

4. Review of Vehicle Sizing

5. Selection Procedure • Find the best endurance flight speed • Happens at (Cd/Cl3/2)min • Size Propeller for flying at Max endurance speed • Adjust RPM’s and diameter for optimum propeller efficiency • Gear box and motor were sized off of max speed • Gear box sized for optimum propeller efficiency • Motor sized by power required and motocalc

6. Advanced Ratio on Thrust Coefficient

7. Advance Ratio On Power Coefficient

8. Advanced Ratio on Propeller Efficiency

9. Endurance Flight • Clendurance = 1.38 • Cdendurance = .0960 • Vendurance = 30.8 ft/s

10. Endurance Flight • (Cd/Cl3/2)min = .0960

11. Endurance Flight • Venduracne = 31 ft/s • Power = 11.1 ft-lbf/s • Cl = 1.37

12. Endurance Flight • D = 16in • RPM = 2355 • Pitch = 10 deg • ηp = .77 • Pout = 11.1 ft-lbf/s • Pin = 14.04 ft-lbf/s • CT = .0293 • CP = .0227 • J = .6

13. High Speed Flight • Vmax = 130 ft/s • Power = 268.5 ft-lbf/s • Cl = .4

14. High Speed Flight • D = 10 in • RPM = 15217 • Pitch = 6.25 deg • ηp = .77 • Pout = 268.5 ft-lbf/s • Pin = 334.9 ft-lbf/s • CT = .0293 • CP = .0227 • J = .6

15. Motor Selection • Kontronik Fun 480-42 40A Brushless Motor • Diameter: 1.1 in • Length: 1.9in • Weight: 5.1oz • Number of Cells Input: 6-12 • RPM/Volt: 4200 • Max RPM: 60,000 • Max Constant Current: 40A

16. Speed Controller • Kontronik Jazz 40-6-18 Brushless ESC • Number of Cells Input: 6-18 • Max Constant Current: 40A • Max Surge Current: 50A • Length: 1.9" (49mm) • Width: 1" (25mm) • Thickness: 0.29" (7.5mm) • LiPo cut off voltage: 3V/cell • Weight: 1.16oz (33g)

17. Gear Box • Gear Ratio of 2.33 • Gear efficency of .96

18. Mission Analysis • Prelimary battery weight - .22lbs • Necessary Battery • Lipo 3000 mAh • 1.2 V per cell • 2 cells • Weight .3lbs • Range 17min

19. Mission Analysis

20. Questions?